<h1 mat-dialog-title class="text-danger">确认删除</h1>
<div mat-dialog-content>
  <p>删除后无法恢复，是否继续?</p>
</div>
<div mat-dialog-actions>
  <button mat-button mat-dialog-close="">取消</button>
  <button class="text-danger" mat-button mat-dialog-close="next" cdkFocusInitial>确认</button>
</div>
